saa7825 NXP Semiconductors, saa7825 Datasheet - Page 63

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saa7825

Manufacturer Part Number
saa7825
Description
Cd Audio Decoder, Digital Servo And Filterless Dac With Integrated Pre-amp And Laser Control
Manufacturer
NXP Semiconductors
Datasheet

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Table 43 sledge_pulse2 parameter: sledge pulse height;
Table 44 vel_parm1 parameter: gain constant for short
2003 Aug 13
sledge_pulse2
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
vel_parm1
0111 1111
0100 0000
0000 0000
1000 0000
0000 xxxx
1000 xxxx
0100 xxxx
1100 xxxx
0010 xxxx
1010 xxxx
0110 xxxx
1110 xxxx
0001 xxxx
1001 xxxx
0101 xxxx
1101 xxxx
0011 xxxx
1011 xxxx
0111 xxxx
1111 xxxx
xxxx 0000
xxxx 0001
xxxx 0010
vel_prop
vel_int
....
....
a
RAM address 64H
jump, integrator cross-over frequency during
jump; RAM address 1FH
Hex
Hex
Cx
Ax
Ex
Dx
Bx
78
....
40
00
....
80
0x
8x
4x
2x
6x
1x
9x
5x
3x
7x
Fx
x0
x1
x2
for short jump
during jump f
Gain constant
integrator hold
Pulse height
level = a/7F,
cross-over
frequency
Integrator
half-scale,
full-scale,
full-scale,
negative
positive
positive
positive
10.0/K
20.0/K
0.1875
0.4375
0.6875
0.9375
1.1875
1.4375
1.6875
1.9375
2.1875
2.4375
2.6875
2.9375
3.1875
3.4375
3.6875
3.9375
zero
K
v
v
v
0
63
Table 45 vel_parm2 parameter: time constant during
vel_parm2
0000 xxxx
1000 xxxx
0100 xxxx
1100 xxxx
0010 xxxx
1010 xxxx
0110 xxxx
1110 xxxx
0001 xxxx
1001 xxxx
0101 xxxx
1101 xxxx
0011 xxxx
1011 xxxx
0111 xxxx
1111 xxxx
xxxx 0000
xxxx 0001
xxxx 0010
xxxx 0011
xxxx 0100
xxxx 0101
xxxx 0110
xxxx 0111
xxxx 1xxx
vel_setp
vel_min
(binary)
vel_parm1
xxxx 0011
xxxx 1111
vel_prop
i
sledge access/actuator access, minimum jump
speed during short jump; RAM address 32H
Hex
Cx
Ax
Ex
Dx
Bx
0x
8x
4x
2x
6x
1x
9x
5x
3x
7x
Fx
x0
x1
x2
x3
x4
x5
x6
x7
Deceleration
Hex
x3
xF
steered ms
V
time fast
actuator
1
10.5
11.2
12.5
15.5
16.5
20.7
31.2
minimum jump speed
128
7.5
8.2
9.7
14
25
41
63
9
Objective specification
undefined
kHz
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
for short jump
Gain constant
SAA7825
i
Deceleration
time sledge
steered ms
150.0/K
30.0/K
10.0/K
K
10.5
11.2
12.5
15.5
16.5
20.7
31.2
128
7.5
8.2
9.7
v
14
25
41
63
9
v
v
v

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